Half Empty or Half Full?

As you may or may not know, philosophy is a new hobby of mine. One night as I was trying to sleep, I found myself contemplating the age old question, "Is the glass half empty or half full?" I started applying some basic rules of Biblical interpretation to the conundrum and asked myself these questions: Just whose glass does this belong to? Were they filling it up and stopped half way or was it full and they drank half of it's contents? What are the contents? Is that lipstick stains on the outside of the glass? Is that a Rocky and Bullwinkle image I see on the opposite side? I finally came to the conclusion that it was none of my business.